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United States Patent | 5,293,032 |
Urshan | March 8, 1994 |
A digital data recording and playback system which includes an optical recording and playback head for recording and reproducing digital data onto and from a stationary optical storage card. The head contains a multiplicity of miniature laser cells mounted in rows and columns and directed to a surface of the stationary optical storage card. The head may be operated in any one of three modes, namely a record mode in which data is recorded on the card; a playback mode in which data recorded on the card is reproduced; and an erase mode in which data recorded on the card is completely or partially erased.
Inventors: | Urshan; Sydney (3151 Cahuenga Blvd., West, Suite 300, Los Angeles, CA 90068) |
Appl. No.: | 845331 |
Filed: | February 10, 1992 |
Current U.S. Class: | 235/454; 235/436; 235/487 |
Intern'l Class: | G06K 007/10; G06K 019/00 |
Field of Search: | 235/454,487,494,468,486,436,437,438,439,440 372/24,29 369/44.37 |
4701674 | Oct., 1987 | Oono et al. | 235/454. |
4730293 | Mar., 1988 | Pierce et al. | 235/454. |
4764931 | Aug., 1988 | Matsuda | 372/50. |
4852075 | Jul., 1989 | Feyrer et al. | 369/100. |
4901325 | Feb., 1990 | Kato et al. | 372/44. |
5128919 | Jul., 1992 | Narahara et al. | 369/44. |
Foreign Patent Documents | |||
0115186 | Jun., 1986 | JP | 235/487. |
0097085 | May., 1987 | JP | 235/487. |
0145792 | Jun., 1989 | JP | 235/454. |
1251444 | Oct., 1989 | JP | 235/454. |